brackett and wyman



BRACKETT & DEARBORN.

Cotton Gin.-

Patented Aug. 27, 1867..

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JOHN B. BRACKETT AND WYMAN DEAR-BORN, OF BOSTON, MASSACHUSETTS.

Letters Patent No. 68,035, dated August 27, 1867.

IMPROVEMENT IN UOTTON GIN AND PIGKEB.

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TO ALL WHOM IT MAY CONCERN:

Be it known that we, JOHN B. Bnncnn'rrr and WYMAN Dniinnonw, of Boston,in the county of Suffolk, and.

State of Massachusetts, have invented a new and useful Ootton-Gin andPicker; and do hereby declare that the following is afull, clear, andexact description of the construction and operation of the same,reference being had to the accompanying drawings, forming a part of thisspecification, and containingfour figures.

Our endeavor in this invention hasbeen, first, to so arrange a smallcleaner or picker in connection with a roller-gin, as to serve at onceas a cotton-cleaner and gin-feed; seeond,'to provide a new and improvedroll for use in roller-gins; third, to present a new form of cleareroperated in a simpler manner than any yet introduced; fourth, to'providea means of clearing the roll of the cotton when the seeds are dofl'edoff; and, fifth, to so arrange and construct the various parts thatproduce the desired results as to make thecomplex design of simpleconstruction, great durability, and easy repair. In the drawings Figuralis a side elevation,

Figure 2 a vertical section,

Figure 3 stransverse section-of the roller and Figure 4 a frontelevation of the attachment of the cotton-dofier, showing itsconstruction.

Figs. 3 and 4 are enlarged.

Between two side frames, A, is placed the-roller B, which is the mainshaft of the machine. This roll, as shown in fig. 3, is of wood, piercedthrough its axis for the spindle b, to which it is attached at eitherend by pin a fixing it in position, and allowing it to be readilyremoved for repairs. This roll has a covering, a, pref- 'erably of sharkskin or dog-fish skin, butthin raw hide dressed and prepared as shagrcenmay .be used, thoughnot so well adapted as the naturalscale, for thepurpose of tearing the cotton from the seed. From this roller B, byhands or gear-wheels C, are driven all the movable parts of the machine.Behind the roll B is pressurebar D, set in brackets on the frame ofthemachine, concave on its upper rear edge, to allow of the motion of theclearers, and presenting only, an edge to the roller B.' The closenessof this pressure-bar to the roll is. regulated by thumb-screw d, whichpasses through the bar,'is keyed on the forward end, and has a shoulderin rear of the bar, and passes through bracket e, as a screw, wherebyeither end of the pressure-bar may be forced in or out, as desired, andthe vertical position is arranged by means of set-screws f. Above and inrear of the pressure-bar is the clearer E, pivoted at 9 upon a pin whichrides in a slot in the frame, and is fixed as desired by thumb-screw 'u,and operated by eccentric pin 1., revolved by belts or gears from wheels0 C" with great rapidity, playing in slotted side plate-h, as shown.This clearer is made with longitudinal bars 70, and shallowtoothedcross-bar Z, for lightness and efficiency, and a longitudinal sectionissubstantially such as shown, fig. 2. In order to clear the roll fromcotton passing through the gin, there is placed beyond the roll adofl'er, F, revolved with great rapidity from band-wheel C, andsweepingthe surface of the roller clean at every revolution. This dofi'er isconstructed as follows: Upon a shaft, m, are afiixed at each end wings'It, which serve as a frame for the back of the rubber brush 1). Thisback is a strip ofwood grooved at the edge for the insertion of a narrowplate of sheet rubber 10, forming the rubber brush. These bars areslotted, as shown in fig. 4, to allow of setting out the brush as itwears, and the whole dofi'er is supported by brackets q, slotted asshown, which may be fixed in their desired position by thumb-screw '11.

The feed-table of this gin is also a picker. It can be detachedwhen'desir'ed by loosening thumb-screws s, and unhooking pin a from thehook t of the frame. This picker is arranged as follows: Twosemi-cylindrical sieves, H H, having semi-cylindrical covers I I arearranged side by side, and in the case so arranged revolves I thetoothed cylinder L, and a second cylinder carrying two fans, M, andteeth to. This second cylinder may,

instead of carrying teeth and fans, carry teeth alone, in which case theupper fan N will be absolutely necessary, though in case the fans M arecarried, the fans under cover K may be dispensed with. Dirty nnginnedcotton is fed in over feed-table G, and is drawn in by the air-blast, ispicked and passed on, lightened of dirt, and loosened by thepicker-teeth, and isthen blown forward upon the clcarers by the fans Mor N, or both, is caught by theteeth of the shark skin and drawn pastthe pressure-bar, cleaned of seed by the clearers, and is then brushedoff the roller by dofi'er F, and falls in a pile at the front of thegin. In gearing the various parts we arrange'so that the c'learers shallreciprocate very much more rapidly than the roll revolves, the firstpicker very much faster than the roll,-'the second picker and fan fasterthan the first, and the dofier at several times the speed of the roll.

We are aware that a cotton-picker resembling this in many details is anold device, but we do not know of one with fans as a constituent part,nor do we know of one attached as a feed to a cotton-gin. The method ofoperating the clearers by an eccentric pin, and without connecting-rods,we believe to be a great advantage, and the new substance for coveringthe roll we believe to be admirably adapted to its purpose, and it iscertainly very accessible in cotton countries near the coast. Weprefer'to wind it on spirally, simply cutting in strips, wetting them,and fastening with glue. Several rolls may be kept constantly on handand slipped on the spindle, while the one used up may be put aside to berecovered at leisure.

We claim as our invention, and desire tosecure by Letters Patent-- 1.The employment of shark skin,dog-fish skin, or shagreen-dressed hide asa covering for rollers of cottongins, substantially as and for thepurpose described.

2. The method of adjusting pressure-bar D by thumb-screw d and set-screwf, arranged and operating substantially as described.

3. The arrangements described and shown for adjusting and operatingclearers E, consisting' of pivot pin "9, fixed in a slot of the frame byscrew it and the slotted side plate I: of the clearer and eccentric pin2', revolved I as described.

as described, all operating together in the manner set forth.

4. The doffer F, consisting of slotted cross-bars with their rubberbrush 1), sustained by Wings 1 and clamping-screws 0 upon shaft m, thewhole driven and operating substantially as described, and also whenarranged with slotted brackets q, as and for the purpose described.

5. The arrangement, as a feed-table to a. cotton-gin, or in combinationwith the feed-table to a cotton-gin, of the cleaning and feedingapparatus, consisting of sieves, covers, toothed cylinders, and fans,asand for the purpose described.

6. The arrangement of fans M or N with toothed cylinders in acotton-cleaner, all operating substantially JOHN B. BRAOKETT, WYMANDEARBOR-N. Witnesses:

Tues. WM. CLARKE, S. 0., Burns.

